Modified db2sql plugin to maintain item_db2.sql

makes it easier to keep the table structure up to date

Signed-off-by: shennetsind <ind@henn.et>
Fixed db2sql plugin forcing minimal mode

Would turn map server into minimal mode regardless of the --db2sql option being used.

Signed-off-by: shennetsind <ind@henn.et>
Official Item BindOnEquip Support

Implements the 'BindOnEquip' item db field which determines whether the piece of equipment should bind to the character upon being equipped.
When a character tries to equip such a item for the first time a dialog shows up asking the character to confirm whether to equip the item or not, and notifying the character that by equipping the item it will become bound to the character, and therefore unable to be used by another character.
Special Thanks to Beret for all the information, Haruna for testing.

Signed-off-by: shennetsind <ind@henn.et>